From 11:00PM PDT on Friday, July 1 until 5:00AM PDT on Saturday, July 2, the Shmoop engineering elves will be making tweaks and improvements to the site. That means Shmoop will be unavailable for use during that time. Thanks for your patience!
Rex is Gwendolen's cousin and the son of Mr. and Mrs. Gascoigne. He falls for Gwendolen pretty hard and totally flips out when she rejects him. When this happens, he decides that he wants to move to Canada to live in the wilderness, which is not dramatic of him at all. He's out of the picture for most of the novel but comes back at the end.